"Obviously I love writing with Katy [Pery], I feel like we're the same person when we write together. Even though we fight a lot, we fight over every line and we pull each other's hair and we cat-fight all the time, it's always worth it in the end."

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I'm very lucky that I have people styling my hair and teaching me how to work with it, but it wasn't always like that. Growing up, I had extremely wavy and thick hair and that can be very overwhelming - you end up with the same ponytail every day.

— Crystal Renn